<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <script src="js/vue.js"></script>

</head>
<body>
  <div id="app"></div>
  <script>
    Vue.createApp(
      {
        data(){
          return{
            counter:1
          }
        },
        mounted(){
          console.log('page load atuo show !');
          setInterval(()=>{
            this.counter +=1
          },1000)
        },
        template:'<div>{{  counter }}</div>'
      }
    ).mount('#app')

  </script>
</body>
</html>
